What happened in this case was a very accidental mistake in speaking, i will be the first to admit that nerves played a major role in this misstep on my behalf as this was one of my first ever presentations to a classroom by myself. I knew that my teacher was married and she thought this was a case of me trying to be humorous to my fellow classmates who laughed at my mistake. Perhaps it was a case of the mouth moving before the brain could react. It was a small mistake that could have been made by anyone who was nervous talking to a crowd of people.
My mistake with my classroom speech harkens back to the phonological rules, it was something that just happened rather than something that should happen. According to my hidden knowledge, i knew my teacher was a Mrs, not a Miss. This much i knew, however being nervous about speaking in front of some thirty people in a classroom and having my teacher grading me brought on a psychological effect and caused me to make a quite accidental slip of the tongue, while not as entertaining as maybe a “Spoonerism”, it seemed to cause unintended humour amongst my fellow classmates. By the way, Spoonerisms are words or phrases in which letters or syllables get swapped. This often happens accidentally in slips of the tongue. The pic below is an example of a spoonerism: